Set noparent in connectivity CTS owners

Also reorganize the files to have one toplevel CTS owners file, and only
additional owners in subdirectories.

Change-Id: I28ce193896e1ade2034589327805870774a4d608
Test: m
diff --git a/tests/cts/OWNERS b/tests/cts/OWNERS
new file mode 100644
index 0000000..4264345
--- /dev/null
+++ b/tests/cts/OWNERS
@@ -0,0 +1,4 @@
+# Bug component: 31808
+set noparent
+lorenzo@google.com
+satk@google.com
\ No newline at end of file